Discharge gate mechanism for concrete transportation conduits



Sept. 14, 1937. E. A. c. EICKSTAEDT 2,092,961

DISCHARGE GATE MECHANISM FOR CONCRETE TRANSPORTATION CONDUITS Filed May1, 1956 2 Sheets-Sheet l Zlrvut Mon Edwirpfl. C Eicksiaed t,

Se t. 14, 1937. E. A. c. EICKSTAEDT I 2,092,961

DISCHARGE GATE MECHANISM FOR CONCRETE TRANSPORTATION CONDUITS Filed May1, 1936 2 Sheets-Sheet 2 awe/whom Edwin CE'zfcksta-edt,

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Patented Sept. 14, 1937 UNITED STATES DISCHARGE GATE MECHANISM' FOR CONCRETE TRANSPORTATION CONDUITS Edwin Alvin Carl Eickstaedt, west Allis,Wis., as-

signor to Chain Belt Company, Milwaukee, Wis., a corporation ofWisconsin Application May 1, 1936, Scrlal-N0.- 77,422

6 Claims.

This invention relates to discharge gate mechanism for concretetransportation conduits, and has for one of its objects to providemechanism of this character which will be simple in construction,comparatively inexpensive tomanufacture, and highly eflicient in use.The invention relates generally to the type of gate disclosed in theprior U. S. Patent No. 2,021,108, granted November 12, 1935, on anapplication filed by Charles I. Longenecker; and more 'specifically, tomechanism for retaining the gate in closed position.

With the above and other objects in view which will appear as thedescription proceeds, the invention consists in the novel details ofconstruction and combinations and arrangements of partscharge gate andassociated mechanism construct ed in accordance with thepresentinvention, the

gate being shown in closed position;

Figure 2 is a central longitudinal sectional view of the parts shown inFigure 1, the clamping mechanism, however, being shown in unlockedposition and the gate. partially open; 1 j. s

Figure 3 is a side elevational view similar to Figure 1, with partsbroken away and'omitted for the sake of clearness, and showing thegatein completely open position, and

Figure 4 is a transverse sectional'view taken approximately on the planeindicated by the line 44 of Figure 1, looking in the direction of thearrows.

The gate structure generally is, or may be, of substantially the same.construction as that set forth in the said Longenecker Patent No.2,021,108, comprising a frame member H) which is rigidly secured toconduit sections II as by 45 welding or in any other suitable manner.The lower portion of the frame member is cut away as at l2 to provide adischarge opening for the concrete mixture, which opening may, ifdesired, be closed by gate member l3 which is pivotally hung on theconduit H by means of the arms I4 engaging the rod or pipe l5 which issecured to the said conduit. The said gate member I3 is preferablyprovided with the rubber gasket or other packing member [6 arranged toseal the joint between the gate, the frame l0 and the conduit sectionsII in substantially the-same manner as set forth insaid'Longenecker-patent.

The frame member I0- is provided with the spaced U-shaped ears 20 inwhich are journalled the bearing portions 2| of shaft 22. The said shaftis provided beyond the bearing portions 2l-with the eccentricallydisposed studs or projections 23 and with the squared extensions 24,which latter receive the operating handles 25. A stirrup 7 from Figure4. The said stirrup ZB-ris preferablyprovided at its bottom with atransverse-brace bar 21 whichis arranged to engage with amember carriedby the gate 13 as will appear more fully below. i

Bolts 28' are passed through theupstanding legs of the U-shaped journals20 of the frame member and serve to retain the shaft 22 in position, aswill be readily understood from the drawings. 7

The gate member l3 has secured to it's bottom a transverselyextending'substantially T-shaped bar 30, the lower surface of: which;31', is adapted to engage with-the upper surface, 29, ofithe brace bar21, as shown 'inzFigures 1 and,.2.w The said member 3|] may be providedwith-the extension 32,.also engageable with the'bar 21, and serving as astop to properly position the stirrup 26- relative tothe gate when the.latteris to be closed and clamped in suchposition.

The member 30 is also provided at one side with a finger or projection35, the "under surface of which is adapted to ride upon the top surface29 of the stirrup bar 21 as the stirrup is swung about the. eccentricmember 23 to clear the gate and permit the latter to drop.

With the parts in the positions illustrated in Figure 1, the dischargeopening I2 is closed by the gate l3 and the plastic concrete mixturewill pass through the conduit ll just as though the latter were a solidpipe. However, if it be desired to discharge mixture through the openingl2 the handles 25 are grasped and moved through an arc of 180 to theposition shown in Figures 2 and 3. This movement will lower theeccentric portions 23 of the shaft 22 and inasmuch as the stirrup 26 ishung upon these eccentrics the said stirrup will be permitted to drop adistance equal to theeccentricity of the members 23. This in turn willpermit the gate I3 to drop to substan- I tially the position shown inFigure 2, after which the operator grasps the stirrup 26 and swings itin a clockwise direction as viewed in Figure 2 to substantially theposition indicated in broken lines in the said figure. During thisswinging movement the top surface of the stirrup bar 2'! will slidealong the under surface of the finger or projection 35 thus supportingthe gate during this movement, and not only preventing its irregularlower surface from catching upon the stirrup, but also preventing thegate from dropping unexpectedly and possibly injuring the hands of theoperator as he moves the stirrup When the stirrup has been moved tosubstantially the broken line position shown in Figure 2 the gate [3will then drop to the position indicated in Figure 3, whereupon plasticmixture moving through the conduit ll may be freely discharged throughthe opening I2. When the discharge is completed the opening may be againclosed byreversing the procedure just described.

With the gate l 3 in open position shown in Figure 3, if it be desiredto discharge the concrete into a hopper, trough, or chute, such device,indicated at 36 in Figure 3, may be supported upon a hook 31 which maybe secured in an aperture 5 38 provided in the lower portion of thestirrup 26, as will be readily understood.

While one form of the invention has been illustrated and described it isobvious that those skilled in the art may vary the details of con- 30struction as well as the precise arrangement of parts without departingfrom the spirit of the invention, and therefore it is not wished to belimited to the above disclosure except as may be required by the claims.

What is claimed is:

1. Mechanism for closing a lateral discharge I opening in a conduit,comprising a gate member mounted on said conduit for movement to andfrom said opening; a stirrup member pivotally carried by said conduitfor engagement with and disengagement from said gate member,saidtstirrup being also arranged for rectilinear clamping movements; andeccentric means for moving said stirrup rectilinearly to cause it toclamp said gate member in closing position.

2. Mechanism for closing a lateral discharge opening in a conduit,comprising a gate member mounted on said conduit for swinging movementsto and from saidopening; a shaft journ'aled on said conduit, said shafthaving eccentric portions;

a stirrup member journaled on said eccentric portions, whereby it may beswung into and out of engagement with said gate member; and means 55 formoving said shaft and eccentric portions to cause said stirrup to clampsaid gate member in closing position.

3. Mechanism for closing a lateral discharge opening in a conduit,comprising a gate member mounted on said conduit for swinging movementsto and from said opening; U-shaped members carried by said conduit; ashaft journaled in said U shaped members, said shaft having a pair ofeccentric projections; bolts passing through the legs of said U-shapedmembers for retaining said shaft in position; a stirrup member journaledon said eccentric projections for swinging movements into and out ofengagement with said gate member; and means for rocking said shaft andeccentric projections to cause said stirrup to clamp said gate member inclosing position, and to release the same.

4. Mechanism for closing a lateral discharge opening in a conduit,comprising a gate member mounted on said conduit for swinging movementsto and from said opening; a stirrup member mounted on said conduit forswinging movements relative to said gate member; means carried by saidgate member for engaging with and positioning said stirrup relative tothe gate when the latter is to be closed; and means for moving saidstirrup to cause it to clamp said gate in closing position.

5. Mechanism for closing a lateral discharge opening in a conduit,comprising a gate member mounted on said conduit for swinging movementsto and from said opening; a stirrup member mounted on said conduit forswinging movements relative to said gate member; means carried by saidgate engageable with said stirrup during the swinging movements of thelatter, whereby the stirrup may support the gate and prevent swinging ofthe latter until the stirrup is clear thereof; and means for moving saidstirrup to cause it to clamp the gate in closing position.

6. Mechanism for closing a lateral discharge opening in a conduit,comprising a gate member mounted on said conduit for swinging movementsto and from said opening; a stirrup member mounted on said conduit forswinging movements relative'to said gate member; means carried by saidgate member for engaging with and positioning said stirrup relative tothe gate when the latter is to be closed, said means having a projectionengageable with the stirrup during the swinging of the latter, wherebythe gate will be supported by the stirrup until the latter is clear; andmeans for moving said stirrup to cause it to clamp said gate in closingposition.

EDWIN ALVIN CARL EICKSTAEDT.

